Concentric Vent Termination - A.O. Smith 300 Series Installation And Operating Manual

CONCENTRIC VENT TERMINATION

A concentric vent termination kit (see Table 3) may be
used for vertical or horizontal terminations. Figure 33
illustrates the concentric vent kit for a horizontal (side wall)
installation. To prevent rain water from entering the exhaust
outlet, slope the vent kit at a downward pitch of 1/4" per
5' away from the inside wall. Ensure the combustion
air intake location is above the anticipated snow level.
Figure 34 illustrates the concentric vent termination kit
in a vertical (roof) installation. Ensure the combustion air
intake location is above the anticipated snow level.
VENT DIA.
2"
3"
Table 3.
ORIENTATION OF EXHAUST PIPING AND COMBUSTION AIR
PIPING RELATIVE TO EACH OTHER MAY BE VERTICAL (AS
SHOWN) OR AT ANY OTHER ANGLE TO SUIT THE INSTALLATION.
EXHAUST
COMBUSTION
AIR
Figure 33.
100304526_2000545240 _Rev. 01
P/N
100112869
100111100
STRAP
(FIELD
SUPPLIED)
SLOPE 1/4" OVER 5'
ELBOW
(FIELD
SUPPLIED)
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45° ELBOW
(SEE
LOCAL
CODES)
VENT SCREEN
INSIDE
COMBUSTION
AIR
FLASHING (FIELD
SUPPLIED)
EXHAUST
Figure 34.
COMBUSTION
AIR
WALL
PIPE NIPPLE
12" ABOVE
ANTICIPATED
SNOW LEVEL OR
12" MIN. ABOVE
ROOF.
ROOF
STRAP
(FIELD
SUPPLIED)
ELBOW
(FIELD
SUPPLIED)
COMBUSTION
AIR
PIPE NIPPLE (USE
WITH ELBOW)
90° ELBOW
(SEE LOCAL
CODES)
1" MINIMUM
VENT SCREEN
INSIDE
31